From Morning to noon of Friday..Scattered showers possible along Karaikal to Rameswaram.From Friday noon to morning of 19-Dec...Heavy / moderate T showers for S-tip,S,SE,S-central Tamilnadu ... https://d2jhuj1whasmze.cloudfront.net/photos/normal/fi6NF.jpgOne or two HEAVY T showers possible for Tirunelveli, Tuticorin and Kanyakumari district on Friday evening, midnight ... https://d2jhuj1whasmze.cloudfront.net/photos/normal/fi6X0.jpgChennai & Pondicherry - on 18,19-Dec, it'll be cloudy, warm day and slightly warm night.Drizzle possible from Early morning to 2pm.Scattered T showers possible again over W-ghats, central, S Kerala on Friday and Saturday.